The PyPy project aims to produce a flexible and fast Python
implementation. This page documents the development of the PyPy
project itself. If you don’t know what PyPy is, consult the PyPy
website. If you just want to use PyPy, consult the download page
and the getting started with pypy documents. If you want to help
develop PyPy – keep reading!

PyPy is written in a language called RPython, which is suitable for
writing dynamic language interpreters (and not much else). RPython is
a subset of Python and is itself written in Python. If you’d like to
learn more about RPython, Starting with RPython should provide a
reasonable overview.

If you would like to contribute to PyPy, please read how to
contribute first. PyPy’s development style is somewhat different to
that of many other software projects and it often surprises
newcomers. What is not necessary is an academic background from
university in writing compilers – much of it does not apply to PyPy
any way.

All of the documentation and source code is available under the MIT license,
unless otherwise specified. Consult LICENSE

IRC channel #pypy on freenode: Many of the core developers are hanging out
at #pypy on irc.freenode.net. You are welcome to join and ask questions
(if they are not already developed in the FAQ).
You can find logs of the channel here.

The PyPy developers are organizing sprints and presenting results at
conferences all year round. They will be happy to meet in person with
anyone interested in the project. Watch out for sprint announcements
on the development mailing list.